Device fqs supplying steam and air to furnaces



B. R. JARMAN.

DEVICE FOR SUPPLYING STEAM AND AIR T0 FURNACES.

APPLICATION FILED OCT. 21, I914.

1,320,866. PatentedNov. 4,1919.

nivrrnn snares rarivr onrron GEORGE E. JARMAN, OF BALTIMORE, MARYLAND, A-SSIGNOR OF ONE-FOURTH TO WILLIAM A. MATTHEWS, (HIE-FOUR T0 '1. RAYMOND MATTHE'VVS, AND

ONE-FOURTH TO LUTHER A. MATTHEWS, ALL OF BALTIMORE, MARYLAND.

DEVICE FOR SUPPLYING- STEAM AND AIR T0 FURNACES.

Specification of Letters Patent.

Patented Nov. at, 1919.

Application filed October 21, 1914. Serial No. 867,837.

To all whom it may concern:

Be it known that I, Gnonon R. JARMAN, a citizen of the United States of America, and resident of Baltimore, in the State of Maryland, have invented certain new and useful Improvements in Device for Supplying Steam and Air to Furnaces,of which the following is a specification.

This invention relates to furnaces and particularly to furnaces under the class of steam boilers, the said invention having for its object the provision of novel means for feeding steam and air to the said furnace for supporting or maintaining combustion and decreasing the consumption of fuel in a manner to increase the efficiency of the power plant. i

A further object of this invention is to provide novel means for mixing steam with air being admitted to a furnace and for heating the commingled steam and air in its passage from the mixer or injector to the furnace, thus maintaining the commingled steam and air at relatively high temperature so that it will to a greater degree support combustion and augment the heating action. It has been found inpractice that the last mentioned object, viz., the

heating of the combined steam and air is of especial import and advantage when used or associated with a furnace which is burning saw dust or other finely divided fuels which necessitate somewhat unusual drafts to effectively consume such fuel.

A still further object of this invention is to provide novel means for adjusting the steam supplying medium so that the correct mixture for a furnace of a given capacity may be insured, the adjustment furthermore permitting such regulation as would compensate for changes in atmospheric conditions, the said invention furthermore contemplating the provision of means whereby steam is admitted in a whirl to the air intake so that the direct or straight air current is broken and equalized at all points of the air intake in order that the commingled steam and air forced and drawn into the furnace, may be of uniform density throughout.

With the foregoing and other objects in view, the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully set forth and claimed.

In describing the invention in detail, ref erence will be had to the accompanying drawings forming part of this specification wherein like characters denote corresponding parts in the several views, in which Figure 1 illustrates a view in elevation of a steam boiler furnace, the same being broken away to show the application of the invention to the said furnace;

Fig. 2 illustrates a vertical sectional view of the combined steam and air feeding device also partly in elevation;

Fig. 3 illustrates a view in elevation of the regulator for the steam injector;

Fig. 4- illustrates a vertical sectional view of the injector shown in Fig. 2.

In these drawings 10 denotes a steam boiler furnace with a steam delivery pipe 11, leading therefrom, and adapted to be connected to the combined air and steam supplying device and this maybe accomplished through the medium of a short hose 12 connectedto a pipe 13 which leads to the in tenor of the air supply pipe 14;. The air supply pipe has a flared mouth 15 controlled by a damper 16 so that air may be admitted in a greater or less degree to effect proper mixture for the purposes intended.

In the device shown in Figs. 2 and 4:; the steam supply pipe is threaded in a coupling 28 extending laterally from the tube 29 which has the flared mouth 30 so that steam is fed from the boiler to the tubular mouth and the eXit of the steam therefrom is controlled by the conical member 31 which is similar to the The external surface of the conical member is externally grooved as at 33 to cause a whirl of the steam in its passage to the air intake.

From an inspection of Figs. 2 and 4, it will be apparent that the supply of steam to the air intake results in the steam being forced toward the Wall of the air intake and that the whirling motion of the said steam will force the air from a straight path and cause it to Whirl in the intake pipe While being forced by the steam and drawn by the draft of the furnace into and through the fire bed.

The stem 32 has a head 34 for the engagement of a Wrench, therefore the stem may be adjusted to regulate the supply of steam to the air intake. By reason of the arrangement just mentioned and the provision for controlling the entrance of air to the air intake, it Will be apparent that a proper proportion of air and steam may be admitted to the furnace.

I claim 1. In combination with an air supply pipe of a steam boiler furnace, a steam deli'vering pipe therein, means for supplying steam to the said delivering member, said delivering member comprising an internally threaded pipe With a flared mouth, a steam supply coupling communicating through the side of the internally threaded pipe, a conical member, a threaded stem on the conical member for engaging the internal threads of the pipe and maintaining the conical member-in spaced relation to the internal Wall of the flared mouth, said stem having a reduced portion forming a duct for the admission of steam from the coupling to and Copies of this patent may be obtained for through the space between the conical member and the flared mouth.

2. In combination With an air supply pipe of a steam boiler furnace, a steam delivering pipe therein, means for supplying steam to the said delivering member, said delivering member comprising an internally threaded pipe With a flared mouth, a steam supply coupling communicating through the side of the internally threaded pipe, a conical member, a threaded stem on the conical member for engaging the internal threads of the pipe and maintaining the conical member in spaced relation to the internal Wall of the flared mouth, said stem having a reduced portion forming a duct for the admission of steam from the coupling to and through the space between the conical member and the flared mouth, and means externally of the said conical member for creating a Whirl.

3. A delivery device for steam consisting of an internally threaded pipe having a flared month, said pipe having a threaded coupling in the side thereof, a conical member having a threaded stem engaging the threads of the pipe for adjustably holding the conical member in spaced relation to the flared mouth, said stem being of reduced diameter between the conical member and the threaded portion to form a port for the passage of steam.

In testimony whereof, I aflix my signature in the presence of two Witnesses.

GEORGE R. JARMAN. Witnesses:

CHARLES L. FEIOK, HERBERT Gr. DORNEY.

five cents each, by addressing the Commissioner of IPatents, Washington, D. G. 

